MK for sure
The 2nd park would depend on what your 2yo likes. These are just some of the things my kids liked at 2.
AK -(This would be my pick) Animals (Petting zoo, a couple walking trails), Rides (Safari (more animals), Triceratop Spin), Shows (Finding Nemo and Flights of Wonder), and Dino Play Area
HS - Shows (Disney JR and Little Mermaid) and TSMM and Honey I Shrunk the Kids Play Area
EPCOT - Inoventions, Rides (Nemo, Figment, Land, Mexico Ride), walking around the Countries
I probably missed something but hope this helps. You always have the option to do MK both days.